the software synchronises SMS from your device to the cloud so you can access it from the browser. You will see all your messages in both browser or app. Messages between mysms users are free.

I have this installed on an Android device for testing a few weeks ago and it looked like a good idea.

Just tried installing it on my Windows Phone and it says my phone number is in an invalid format. I have one of the six digits Vodafone numbers (+64 21361xxx) and I suspect the app is expecting a minimum length of seven or more. Reported this here and if you have the same problem please let them know by posting in that thread.

Downloaded the app to my Windows Phone. Started it, got prompted to enter my mobile no (Telecom 7 digit) and got texted an activation code, which included several non-english characters, so copy and pasted into the activation code field and pressed the tick. Screen just went blank and app closed. So now when I restart it I'm just being prompted again.

Nothing in the FAQ's at mysms.com to indicate how the activation process works, or how you subsequently create a login and password.

Downloaded the app to my Windows Phone. Started it, got prompted to enter my mobile no (Telecom 7 digit) and got texted an activation code, which included several non-english characters, so copy and pasted into the activation code field and pressed the tick. Screen just went blank and app closed. So now when I restart it I'm just being prompted again.

Nothing in the FAQ's at mysms.com to indicate how the activation process works, or how you subsequently create a login and password.

Anyone used it in earnest?

Exactly the same thing just happened to me. Seems the activation code is meant to be numbers but I got letters and non english characters.

billgates: mySMS on Windows phone is another Whatsaapp/groupme/viber like client due to the API level restrictions that devs have in WP 7.5 SDK.

WP8 will have backup options for SMS, apps settings and more :)

Cool. Sadly, I'm on the fence for our next phone upgrade.. I see so much potential for WP8... but its limitation on not able to share purchased apps, or the tightly integration of primary ID with XBoxLive and SkyDrive et al kinda putting me off..

The mysms description in Marketplace clearly says messages are kept in sync. Unless the app is mysms Messenger which is only to communicate with other mysms users, in which case it is nothing more than those apps...